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Abstract
Time-resolved luminescence studies of several new multi-component crossluminescence crystals as well as La1-x Ce x F3 (x = 0.4 ÷ 0.9) crystals have been carried out under vacuum UV (10 ÷ 30 eV) and soft X-ray (hv ∼ 1 keV) synchrotron radiation excitation. The band structure parameters of the studied crossluminescence crystals have been estimated by using the spectral data obtained. The non-monotonic dependence of the light yield on x has been observed for La1-x Ce x F3, the optimum value of x being near 0.7. The result is discussed on the basis of different models of Ce3+ emission quenching.